Sand-throwing machine



J. S. TOWNSEND.

SAND maowme MACHINE.

APPLICATION FILED' .IULY 3,1920.

1,386,212, Patented Aug. 2, 1921.

4 SHEETS-SHEET l.

J. SLTOWNSEND.

SAND THROWING MACHINE- APPLICATION FILED JULY 3.1920.

Patented Aug. 2, 1921.

J. S. TOWNSEND.

SAND THROWING MACHINE.

APPLICATION FILED JULY 3,1920.

1,386,212, Patented'Aug; 2,1921.

4 $HEETS-SHEET 3.

J. S. TOWNSEND.

SAND THROWING MACHINE.

APPLICATION mu) JULY 3,1920.

1,386,212, PatentedAug. 2, 1921.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFIOE.

JOHN S. TOWNSEND, OF HARVEY, ILLINOIS, ASSIGNOR TO WHITING CORPORATION, OF HARVEY, ILLINOIS A CORPORATION OF ILLINOIS.

SAND-THROWIN'G MACHINE.

Specification of Letters Patent.

Patented Aug. 2, 1921.

Application filed July 3, 1920. Serial No. 393,954.

T 0 all whom 2'2? may concern.

Be it known that I, JOHN S. TOWNSEND, a citizen of the United States, residing at Harvey, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Sand-Throwing Machines, of which the following is a specification.

This invention relates to machines used in foundries and the like for throwing sand, usually in wads or gobs into a mold about a pattern from which a casting is to be made.

The object of the invention is to provide a machine of this class in which a sand throwing head of any known type, for delivering sand substantially vertically into the mold, may be moved, at the will of the operator, to any desired point in a predetermined area about a central post or standard, and to in any such position of the sand throwing head, supply sand continuously for its use. A further object of the invention is to provide such a machine which operates under an unusually low head room in doing its work. This is very important as many foundries to which such a machine could be sold are in old buildings with very low ceilings. A further object is to provide such a mecha nism which is very compact so that it may be used at will on a fixed post as heretofore suggested or supported on a movable support and carried about the foundry.

The invention consists in mechanism for carrying out the foregoing objects which can be easily and comparatively cheaply made, which is effective in use and not liable to get out of order. More particularly the invention consists in many features and details of construction hereafter more fully set forth in the specification and claims.

Referring to the drawings in which similar numerals indicate similar parts in the several views,

Figure 1 is a side elevation of the essential parts of mechanism illustrating this invention in its preferred form.

Fig. 2 is a plan view of the swinging arm mechanism which carries the sand conveyer and the sand throwing mechanism.

Fig. 3 is a sectional detail view of one form of specific sand throwing mechanism taken on the line 33 of Fig. 2. This particular form of throwing head is the subject matter of my prior application, Serial No. 371,799, filed April 7, 1920.

Fig. 4 is an end View taken on the irregular line 4-4 Fig. 1.

Fig. 5 is a similar end View taken on the irregular line 55, Fig. 1.

Fig. 6 is a side view largely in section showing the mounting of the entire ma chine on a post, which in the particular case here illustrated, happens to be supported directly on the ground or floor.

Fig. 7 is a plan partially in section of the swinging arm mechanism taken on approximately the irregular line 77 of Fig. 1.

Fig. 8 is a sectional detail view on approximately the line 8-8 of Fig. 1.

The entire machine of this invention swings about a vertical post or pivot 12 supported in any suitable manner either on a stationary support 14, in the particular case here illustrated, integral therewith, resting on the ground 16, or upon a moving object at the will of the original constructor.

Rotatably mounted upon the post 12 is a swinging bracket arm 18. In the particular construction here illustrated this arm is separate from and detachably secured to a vertical hub 20 journaled on the member 12 at its top through the standard type of ball bearings 22 arranged to take both the load and radial thrust and journaled at its bottom on roller bearings 24 of standard type adapted to take radial thrust. The outer or free swinging end of bracket arm 18 carries a vertical shaft 26 on which is journaled a secondary arm 28 on Whose outer end is mounted the sand throwing head mechanism 30 of Fig. 3 adapted to have sand enter its upper port 32 and leave its lower port 34 under the propulsion of the driving fingers 36 as more fully set forth in said prior application.

Fingers 36, are driven by shafts 38 and 40 connected together by suitable gears 42 as fully appears in said prior application. One of these shafts as 40 is longer than the other and connected by a flexible coupling 44 to a source of power, in the particular case here illustrated a motor 46. This source of power or motor is in the particular case here illustrated secured to the side of secondary arm 28 by means of bolts 48'. The result of this construction is that the secondary arm 28 may be swung as desired two idler pulleys 61 and about the pivot 26 without in any way affecting transmission of power from the power source motor46 to the sand drivlng fingers 36.

Rising from the secondary arm 28 are two rigid upright supports 50 carrying a hor zontal frame work 52. This framework 52 carries four transverse shafts 53, 54, 55 and 56. Passing over pulleys 57 and 58 on shafts 53 and 56 respectively is a sand carrying belt 60 whose lower side is carried over 62 on shafts 54 and 55 respectively.

The side edges of the upper section of the belt 60, as viewed in Figs. 1 and 4, are protected and guarded by side rails 64 carried on upright bracket arms 66 The right hand portion of the belt 60 as 1t passes over pulley 58 enters and is guarded on 1ts sides by a hopper 68 leading to inletport 2320f the sand throwing head. The result of this construction is that-sand on the upper side of belt 60 and moved to the right by it, as viewed in Fig. 1', between the guard rails 64, is delivered through the hopper 68 11110 the sand throi vinghead. The belt60 is driven through the agency of gears 69 and 70 on shafts 58 and 54 respectively; a bevel gear 71 on shaft 54, a bevel gear 72 on a vert1cal shaft 74, and means hereafter described for properly rotating the latter shaft.

It will be noticed that asthe upright sup ports 50 are rigid on the'secondary' arm 28 and the conveyer belt mechanism just described, is supported by these uprights, sand delivered onto the upper section of belt 60 'will be delivered into the sand throwing head regardless of the angular position of the secondary arm about pivot pin 26.

The shaft 74, heretofore referred to, is so mounted that it is in alinement with shaft 26 in all positions of the machine, and consequently the delivery of power from the shaft 74 to the belt 60 is never disturbed by a change in the angular position of either one of the arms 18 or 28.

Shaft 74 is journaled at its upper end in a suitable bearing 76 provided for it in a diagonally inclined frame work 78 rigidly supported above and carried by the arm 18 by upright supports 80, suitably secured thereto. j

This frame work 78 is similar to frame 52 in that it carries four shafts 81, 82, 83 and 84, each inturn carrying pulleys numbered respectively 86, 87, 88 and 89 over which passes the belt 90 adapted to convey sand from a hopper 92 positioned over the central axis of the post 12 upward and into a hopper 94 having a downwardly inclined chute 96 adapted for delivery of sand onto conveyer belt 60.

The last mentioned operation is accomplished, in all'positions of the machine, by

providing this downwardly pointed chute 96 with a rotatably mounted spout 98 connected to it by joint mechanism 100 clearly appearing in Fig. 8 which enables the spout 98 to be moved in'angular unison with the conveyer belt 60 with reference to the belt 90.

For this purpose the lower end of the spout 98 is provided with fingers 102 which enter between and engage the side rails 64 as clearly shown in Fig. 4.

The upperend of shaft 74 above the bearing 76 carries a bevel gear 104 meshing. with a bevel gear 106 on shaft 84. Shaft 84 carries a spur gear 108 driven by a pinion 110 on shaft 83 which in turn carries a sprocket gear 112 over which travels a sprocket chain 114 which in turn travels overa sprocket gear 1 16 upon a shaft 118 mounted on suitable brackets below the. frame 78. This shaft is in turn driven by obvious sprocket gear mechanism 120 from a motor 122 carried by a bracket arm 18.

From the foregoing it will be seen that when motor 122 is in operation it drives belts 90 and 60 at uniform speed in all positions ofthe two. arms 18 and 28 with reference to each other. Consequently the sand throwing head of, Fig. 3 may be moved to any point outside the support 1214 and inside the circumference described by the head when the arms are extended as shown in Fig. 1, to deliver sand from hopper 92 into a mold (not shown) placed below the 1 device.

moving belt 90 never takes more than a. predetermined desired quantity of sand from the hopper 92 over to the hopper 94 thus insuring satisfactory smooth operation of the machine;

The motors 122 and 46 are supplied with electricity. by means without novelty in this invention, therefore notshown,the same being so controlled by switches or controllers that onstarting the device the motor 46 starts somewhat in advance of motor 122 and that on stopping the motor 122 stops first. This insures the sand throwing headls taking care of all the'sand which is going to reach it before the machine stops entirely, while the head is running at speed, and thus arevents clogging of the sand throwing head as might'be the case were sand allowed to flow into it as it slowed down or after it stopped. I V 7 It will be noticed that the conveyer belt 90 takes the sand from the hopper 92 at a relatively low point and carries it upward to a hopper 94 whichis relatively near to and approximately over the sand throwing head. This allows for proper delivery of s'and to the sand throwing head without increasing the height of the machine as is required in' previous structures where the sand is delivered by a direct downwardly inclined chute mechanism leading from a hopper corresponding to hopper 92 above the pivotal axis of the swinging arm mechanism. It should be remembered that in order to provide for the flexibility of the device the main sand hopper has to be over the axis of the main pivot post 12.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

1. In mechanism of the class described, the combination with a pivotal support, an arm pivoted thereto and swinging horizontally on the support, a secondary horizontally swinging arm pivoted to the first arm, a sand throwing head at the outer end of the swinging arm, means carried by the secondary arm for operating said head, a sand conveyer belt mechanism extending along the secondary arm and delivering to the sand throwing head, another sand conveying belt mechanism extending along the length of the first swinging arm and delivering from above to the first conveyer mechanism, means for supplying sand to the second sand conveyer mechanism at a point above the main support, and one single means for driving both of said sand conveyer mechanisms, for the purposes set forth.

2. In mechanism of the class described, a vertical support, a horizontally swinging arm pivoted thereto, a secondary horizontally swinging arm pivoted to the first arm, a sand throwing head, and means for operating it carried by the second arm, two sand conveyer belt mechanisms, one carried by each arm, that on the first arm delivering to the second belt, in all angular positions of the two arms to each other, the second con veyer belt delivering to the sand throwing head, and one means for operating said belts in unison.

3. In mechanism of the class described, a vertical support, a horizontally swinging arm pivoted thereto, a secondary horizontally swingin arm pivoted to the first arm, a sand throwing head, and means for operating it carried by the second arm, two sand conveyer belt mechanisms, one carried by each arm, that on the first arm delivering to the second belt, in all angular positions of the two arms to each other, the second conveyer belt delivering to the sand throwing head, a single motor, and means by which it operates said belts in unison.

a. In mechanism of the class described, a vertical support, a horizontally swinging arm pivoted thereto, a secondary horizontally swinging arm pivoted to the first arm, a sand throwing head, and means for operating it carried by the second arm, two sand conveyer belt mechanisms, one carried by each arm, that on the first arm delivering to the secondbelt, in all angular positions of the two arms to each other, the second conveyer belt delivering to the sand throwing head, and means for operating said belts in unison, and means delivering sand to the conveyer belt on the first arm in all positions of that arm.

,5. In mechanism of the class described, a vertical support, a horizontally swinging arm pivoted thereto, a secondary horizontally swinging arm pivoted to the first arm, a sand throwing head, and means for operating it carried by the second arm, two sand conveyer belt mechanisms, one carried by each arm, that on the first arm delivering to the second belt, in all angular positions of the two arms to each other, the second conveyer belt delivering to the sand throwing head, a single motor and means by which it operates said belts in unison, and means over the central pivot delivering sand to the adjacent conveyer belt.

6. In mechanism of the class described, a vertical pivot, a horizontally swinging arm pivoted thereto, a secondary horizontally swinging arm pivoted to the first arm, a sand throwing head, and means for operating it carried on the second arm, a sand conveyer belt extending the length of the second arm and delivering to the sand throwing head, a second sand conveyer belt moving the entire length of the first pivoted arm, said belt being located in a plane above the first mentioned conveyer belt, and upwardly inclined with reference thereto, a hopper for sand over the main pivot delivering sand to the second mentioned conveyer belt, a hopper at the end of said second mentioned conveyer belt into which said belt delivers sand, a discharge spout leading from the second hopper to the first mentioned sand conveyer belt, and means for angularly moving said spout so that it always delivers sand from the second hopper to the first conveyer belt, in all positions of the arms with reference to the pivot, for the purposes set forth.

7. In mechanism of the class described, a vertical pivot, a horizontally swinging arm pivoted thereto, a secondary horizontally swinging arm pivoted to the first arm, a sand throwing head, and means for operating it carried on the second arm, a sand conveyer belt extending the length of the second arm and delivering to the sand throwing head, a second sand conveyer belt moving the entire length of the first pivoted arm, said belt being located in a plane above the first mentioned conveyer belt, and upwardly inclined with reference thereto, a hopper for sand over the main pivot delivering sand to the second mentioned conveyer belt, a hopper at the end of said second mentioned conveyer belt into which said belt delivers sand, a discharge spout leading from the second hopper to the first mentioned sand conveyer belt, and means for singularly-moving said spout so that it always delivers sand from the second hopper to the first conveyerbelt, in all positions oif'the arm with referenceto the pivot, and means includinga shaft in alinement with the pivotal axis between the two arms, for drivingsaid sand conveyer belts in unison for the purposes set forth. a

8. In mechanism of the classdescribed, a fixed pivot, a jointed swinging arm mechanism mounted therein carrying at'its free end a sand throwing head and means. for operat ing it, a sand delivery receptacle over said fixed support, and a plurality of; sand con-H veyer belts, one-foreach section of the arms, arranged to successively transport portions of sand delivered by said receptacle from one belt to another and thence to the sand throwing head and to do this, in all folded positions of the. arm, and a single motor mechanism and gearing therefor adapted to operate said conveyers in unison as the arm swings.

. In witness whereoifi, I have hereunto subscribed my name in the presence of two witnesses.

JOHN S. TQWNSENI),

Witnesses DWIGHT. 'B. CHEEVER, ANNA ROSENTHAL. 

